Method and magnetic resonance device for graphically assisting navigation of an instrument

摘要

In a method and magnetic resonance device for graphically assisting the navigation of an instrument (in particular a medical instrument such as a needle and/or a guide sleeve guiding a needle) within a procedure region of a target subject (in particular a patient), coordinates of a target position and/or target region to be addressed that are obtained from a high-contrast image data set acquired with the magnetic resonance device. Low-contrast image data showing the instrument are acquired continuously and/or intermittently during the navigation and/or the position and orientation of the instrument is determined (in particular measured) with a position determination device. The low-contrast image later are brought into registration with the magnetic resonance device continuously and/or intermittently during the navigation. A representation showing at least the relative position and orientation of the instrument relative to the target position and/or target region is generated and displayed under consideration of the coordinates and the low-contrast image data and/or the position and orientation of the instrument.

主权项

1. A method for graphically assisting navigation of a medical instrument in a magnetic resonance device within a medical procedure region in a patient in the magnetic resonance device, comprising:
operating the magnetic resonance device with the patient therein to obtain a high-contrast image data set representing said procedure region, said high-contrast image data set being acquired in a magnetic resonance device coordinate system associated with the magnetic resonance device; supplying said high-contrast image data set to a computerized processor and, in said computerized processor, automatically determining, from said high-contrast image data set, coordinates of a target, in said magnetic resonance device coordinate system, to be reached by the instrument in said procedure region, said coordinates of said target being selected from the group consisting of a target position and a target region; obtaining instrument-representing data representing said instrument during movement of said instrument in said procedure region toward said target by operating said magnetic resonance device to intermittently or continuously acquire low-contrast image data representing said instrument during movement of said instrument in said procedure region toward said target; supplying said low contrast data representing said instrument to said computerized processor and, in said processor, automatically generating a low-contrast image therefrom in which said instrument, and said target at said coordinates of said target, are visualized; and at a display device in communication with said computerized processor, visually displaying said low-contrast image to show said instrument relative to said coordinates of said target.